def deviationrecords( request ):
trip_id = request.GET['trip_id']
stus = StopTimeUpdate.objects.all().filter(trip__trip_id=trip_id).order_by("fetch_timestamp").select_related('trip')
# buckets dict of (trip_id, start_date) -> stu
buckets = {}
for stu in stus:
if (stu.trip_id, stu.start_date) not in buckets:
buckets[(stu.trip_id, stu.start_date)] = []
# make the stoptimeupdate into a jsonable dict
obj = stu.to_jsonable()
trip_start_dt = build_datetime( stu.start_date, stu.trip.start_time )
# datetime for the data
data_dt = datetime.fromtimestamp( stu.data_timestamp )
# time of the stoptimeupdate with respect to when the trip starts
time_since_trip_start = data_dt - trip_start_dt
obj['time_since_trip_start'] = time_since_trip_start.days*24*3600 + time_since_trip_start.seconds
buckets[(stu.trip_id, stu.start_date)].append( obj )
return HttpResponse( json.dumps( buckets.items(), indent=2 ), mimetype="text/plain" )
def deviationrecords(request):
trip_id = request.GET['trip_id']
stus = StopTimeUpdate.objects.all().filter(trip__trip_id=trip_id).order_by(
"fetch_timestamp").select_related('trip')
# buckets dict of (trip_id, start_date) -> stu
buckets = {}
for stu in stus:
if (stu.trip_id, stu.start_date) not in buckets:
buckets[(stu.trip_id, stu.start_date)] = []
# make the stoptimeupdate into a jsonable dict
obj = stu.to_jsonable()
trip_start_dt = build_datetime(stu.start_date, stu.trip.start_time)
# datetime for the data
data_dt = datetime.fromtimestamp(stu.data_timestamp)
# time of the stoptimeupdate with respect to when the trip starts
time_since_trip_start = data_dt - trip_start_dt
obj['time_since_trip_start'] = time_since_trip_start.days * 24 * 3600 + time_since_trip_start.seconds
buckets[(stu.trip_id, stu.start_date)].append(obj)
return HttpResponse(json.dumps(buckets.items(), indent=2),
mimetype="text/plain")
def set_vehicle_dist_along_route(self, shape, shapelen, first_stoptime):
scheduled_start_dt = build_datetime(self.start_date, first_stoptime.departure_time)
for vp in self.vps:
scheddiff = vp.data_time - scheduled_start_dt
vp.time_since_start = scheddiff.days * 3600 * 24 + scheddiff.seconds + scheddiff.microseconds / 1.0e6
vp.percent_along_route = shape.project(vp.shape, normalized=True)
vp.dist_along_route = vp.percent_along_route * shapelen
def set_vehicle_dist_along_route( self, shape, shapelen, first_stoptime ):
scheduled_start_dt = build_datetime( self.start_date, first_stoptime.departure_time )
for vp in self.vps:
scheddiff = vp.data_time - scheduled_start_dt
vp.time_since_start = scheddiff.days*3600*24 + scheddiff.seconds + scheddiff.microseconds/1.0e6
vp.percent_along_route = shape.project( vp.shape, normalized=True )
vp.dist_along_route = vp.percent_along_route*shapelen
def set_vehicle_position_deviation_metadata( self, shape, stoptimes ):
# adds a 'sched_deviation' property to each vehicle position in 'vps'
# in the process it writes all over all vps and stoptime instances
for stoptime in stoptimes:
stoptime.percent_along_route = shape.project( stoptime.stop.shape, normalized=True )
for vp in self.vps:
vp.percent_along_route = shape.project( vp.shape, normalized=True )
vp.scheduled_time = self._time_at_percent_along_route( stoptimes, vp.percent_along_route ) # seconds since midnight; can go over 24 hours
vp.scheduled_time_str = gtfs_timestr( vp.scheduled_time )
scheduled_time_dt = build_datetime( vp.start_date, vp.scheduled_time )
scheddiff = vp.data_time - scheduled_time_dt
vp.sched_deviation = scheddiff.days*3600*24 + scheddiff.seconds + scheddiff.microseconds/1.0e6
def set_vehicle_position_deviation_metadata(self, shape, stoptimes):
# adds a 'sched_deviation' property to each vehicle position in 'vps'
# in the process it writes all over all vps and stoptime instances
for stoptime in stoptimes:
stoptime.percent_along_route = shape.project(stoptime.stop.shape, normalized=True)
for vp in self.vps:
vp.percent_along_route = shape.project(vp.shape, normalized=True)
vp.scheduled_time = self._time_at_percent_along_route(
stoptimes, vp.percent_along_route
) # seconds since midnight; can go over 24 hours
vp.scheduled_time_str = gtfs_timestr(vp.scheduled_time)
scheduled_time_dt = build_datetime(vp.start_date, vp.scheduled_time)
scheddiff = vp.data_time - scheduled_time_dt
vp.sched_deviation = scheddiff.days * 3600 * 24 + scheddiff.seconds + scheddiff.microseconds / 1.0e6
